fix: More small security fixes

[devinbinnie]

2 more small fixes:

• Removed backtick escaping for Windows code signing as it is unnecessary for Powershell and can cause the script to attempt to access the wrong file
• Updated the proxy filename to be more secure (512-bit string)

Let me know if I need to split these up or if I can leave it as one commit.

[changeset-bot]

🦋 Changeset detected

Latest commit: 198a695

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
electron-updater	Patch

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[mmaietta]

It's okay if it's within one PR. Please update the changeset file to be more specific though as that's what generates the changelogs. It can just be your ticket description

• Removed backtick escaping for Windows code signing as it is unnecessary for Powershell and can cause the script to attempt to access the wrong file
• Updated the proxy filename to be more secure (512-bit string)

[devinbinnie]

Thanks @mmaietta. Should be good to merge now. 👍